docs: def get_roles(server_context, container_path=None):
      """
      Gets the set of permissions and roles available from the server
      :param server_context: A LabKey server context. See utils.create_server_context.
      :param container_path:
      :return:
      """
      url = server_context.build_url(security_controller, 'getRoles.api', container_path=container_path)
      return server_context.make_request(url, None)